the newer MAFs are better. no matter what though you CANNOT just install a larger MAF and larger injectors without tuning the PCM for them. If these are something that you will be using with a turbo then you should find either an 80 or 90mm Mustang or Lightning MAF and 24# or larger injectors.
i keep trying to rationalize getting anything bigger than 30s. it doesnt seem necessary, although everyone on here has done just that. ill have to talk to the guy to see what hell do for me for 42s and the cobra maf